Aquarium heater ideal for up to 100-200 gallon tanks. Hydor-Theo fish tank heaters have all the necessary features for safe and precise temperature maintenance of the water in your tank or reservoir. The exclusive technology and the high quality of the components guarantee a long lasting product.

Powerful Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums aquariums. The heater includes many practical features for easy use, safety and convenience, including an easy-to-access temperature set dial, on/off pilot light indicator and a bumper guard for fish safety. Made of durable high-impact glass, it's built to last under normal aquatic conditions.

Powerful 50 W Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums aquariums up to 10 gallons. The heater includes many practical features for easy use, safety and convenience, including an easy-to-access temperature set dial, on/off pilot light indicator and a bumper guard for fish safety. Made of durable high-impact glass, it's built to last under normal aquatic conditions.

Easy to use thermostat controller, perfect for fish tanks up to 65 gallons! This 300W tank heater is safe and reliable. It has an adjustable temperature setting from 68°F to 93°F, an easy-to-read temperature indicator, and compact design. Strong and long lasting, breakage is not an issue as with glass heaters.

Providing a consistent water temperature for your fish is critical for their health. The AQUATOP line of titanium heaters are compact and durable. Each heater comes with a controller, thermostat and sensor. The 800 and 1000 watt units feature a dual display digital controller with audible high/low temp alarm.